As an equation: x2 - x = 2, or x2 - x - 2 = 0.
This can be solved by trial and error, or with the quadratic formula. In the case of the quadratic formula, a = 1, b = -1, and c = -2.
x2 - x - 2 = 0
(x-2)(x+1)=0
x-2=0
x+1=0
x=2
x=-1
9
2 or -1
2
The next number is the sequence is 10. To find the second number, 1 was subtracted from the first number To find the third number, 2 was subtracted from the second number To find the fourth number, 3 was subtracted from the third number Therefore to find the fifth number, 4 must be subtracted from the fourth number. 14 - 4 = 10
⅔ a number - 9 = 7 → ⅔ a number = 7 + 9 = 16 → the number is 16 × 3/2 = 24.
9
2 or -1
The number is 5.
14
8.25
2
22 - 2 = 2. The number is therefore 2.
The number you are referring to is 6.
2. 2 squared = 4, and 4-2 = 2
-11
The next number is the sequence is 10. To find the second number, 1 was subtracted from the first number To find the third number, 2 was subtracted from the second number To find the fourth number, 3 was subtracted from the third number Therefore to find the fifth number, 4 must be subtracted from the fourth number. 14 - 4 = 10
⅔ a number - 9 = 7 → ⅔ a number = 7 + 9 = 16 → the number is 16 × 3/2 = 24.